SU1058096A1 - Sealed package for electronic equipment - Google Patents

Abstract

1. SEALED HOUSING FOR RADIOELECTRONIC EQUIPMENT, Holding the casing with flat ribs tightly connected to the lid, stiffness grille located on the side walls of the casing between its flat fins with the south of ensuring thermal contact between them, in order to increase efficiency, in order to increase efficiency, in order to increase efficiency, in order to improve the efficiency of the case, to ensure thermal contact between them, in order to increase efficiency, in order to improve efficiency, to achieve efficiency, in the result of efficiency, in the result, to ensure the thermal contact between them, in order to improve efficiency, in this case, in order to increase efficiency, in order to increase efficiency, in the case of thermal contact between them, providing effective thermal contact between them, with the purpose of efficiency, the stiffness lattice is formed by thin-walled glasses with hemispherical bottoms, and perforated cylindrical walls connected by their bottoms with side walls of the casing.

Description

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2, the Corps according to claim 1, about tl and -5

the fact that the perforation of each thin-walled glass is produced in the form of through longitudinal slots of variable width, decreasing in the direction of its bottom,

 3. The body according to claim 1, distinguishing between u and in that the perforator i of each thin-walled glass is made in the form of transverse slots.

4. The body according to claim 1, characterized in that the perforation of each thin-walled glass is made in the form of openings of a round shape,

5.Corp; / s on PP. 1-4, of which is due to the fact that

at least one of the thin-walled glasses on each side wall

ib is filled with b (elshey height, - than other thin-walled glasses.

The invention relates to radio electronics, in particular to the design of equipment housings operating under mechanical and climatic influences.

A sealed enclosure is known, which is designed to house electronic equipment operating on aircraft. Said housing comprises a key, a base and side and end walls, each of which is provided with a stiffness grid having thermal contact with the wall. The walls of the case form a box, are glued, welded or sealed. Into the case, perpendicular to its longitudinal axis, electronic boards 1} are inserted,

However, the design of the case does not provide effective heat removal from external surfaces, and also has a relatively large weight and volume of metal construction.

The most technical to the proposed invention is a sealed enclosure for electronic equipment containing skin tightly connected to the hatch with ShIOsk shrubksha, stiffening rack located on the side walls between its flat ribs with the possibility of ensuring thermal contact between them 2.

The disadvantages of the known body are that its design does not provide effective heat removal from the outer surface and has a large mass.

The purpose of the invention is to increase the efficiency of heat transfer.

The goal is achieved by the fact that in a hermetic case containing a casing with flat pe6peiMH peuieTKK rigidly connected to a kriyka, is located at the side walls of the casing between its flat ribs with the possibility of thermal contact between them

It is called thin-walled glasses with hemispherical bottoms and perforated cylindrical walls, connected by their own UVUOI bottoms with side walls of the Case-,

Moreover, the perforations can be different, in particular, it can be made in the form of through longitudinal slots of variable width, decreasing in the direction to the bottom of the glass, transverse slots, or round-shaped holes, besides at least one of the thin-walled glasses on the side wall made of greater height than other thin-walled glasses.

FIG. 1 shows a housing with a stiffening lattice made in the form of adjacent cups, the cylindrical part of which has longitudinal through slots / in FIG. 2, section 2 in FIG. 1; FIG. 3 shows the thermal bridge formed by the articulation of the glasses of the two buildings / FIG. 4, the side wall with the glasses, the cylin, the crown part of which is: it has transverse slits / in FIG. 5 - the same, with round-shaped holes.

Sealed enclosure, for example, box-shaped ((opNU, contains side walls 1, bottom 2 and hermetic. Key 3 (Fig. 1, 4, and 5)), Side walls 1 are equipped with stiffeners 4 and along the perimeter plate fins 5, Each pei-ieTKa 4 made of close-fitting along forming thin-walled cups 6 with helical ribs 5 and one heaped-shaped bottom of glasses 7, Each cup is connected to the bottom wall 1 of its body with its bottom; I have 7, for example, by soldering or welding. The outer surface of the hemispherical bottoms 7 covered with a metal metla, identical About the metal of the side walls 1 of the housing in the case of the manufacture of glasses 6 and walls

1 case of various metals). As a result, the thermal resistance of the contact is reduced, the potential of corrosion caused by the potential difference is eliminated, and also brazing in this area is performed. The tight fit of glasses b to plate fins 5 and one to the other can be ensured, for example, by welding, soldering or mechanical fastening. On the tops of hemispherical days151 7 kygut be flat contact spots. . The cylindrical part of the glasses 6 is perforated. Perforash can be of various shapes, in particular, made in the form of through longitudinal slots 8 of variable width, decreasing in the direction to the bottom of the glass (Fig. 1 and 2, transverse slots 9 (Fig. 4) and holes 10 round formulas (Fig. 5) At least one of the glasses .11 on each side wall 1 has a height greater than that of the other glasses. The body is sealed with a foam joint using a rubber gasket 12, steel wire 13 and solder 14, evacuated with air (evacuated) and filled with dry nitrogen under some excess g (1.2 - 1,). This avoids moisture penetration into the case for several years. A package can be installed in the case, cells with printed circuit boards. The heights of the cups 6 are 8 mm, the outer diameter is 8 mm, the outer radius hemispheres of 4 mm and a wall thickness of 0.3 mm. Cups 11 have a height of 12 mm.

When the valve 3 is installed with a subsequent-seam sealing, reliable sealing of the internal volume of the housing is ensured (Fig. 1). The evacuation process is accompanied by the occurrence of considerable forces exerted outside the housing. The forces of the caliper were effected by a pressure difference outside and inside the body equal to 10 Pa (1 kg / cm). The stiffness grid 4 provides resistance to the effects of these forces and allows walls to be made thinner than smooth ones. This allows for a lighter body. The hemispherical shape of the bottoms of 7 glasses 6 is the most resistant to the effects of contact pressures, which are determined by the difference in pressure outside and inside the case and temperature stress, which allows the glasses 6 to be thin-walled and significantly reduce the mass of the grids while maintaining the strength characteristics of the whole case.

The presence of a coating on the outer surface of hemispherical bottoms leads to a decrease in the overall thermal resistance of the housing and, consequently, a decrease in the Maximum temperature of the housing, Heat sinks in the form of glasses. With perforations of 8-10, increasing turbulence.

5 air flow, with fan blowing, increasing heat transfer. Glasses 11, having a height higher than that of other glasses, may perform Functions during operation.

0 thermal bridges (ijMr. 1 and 3). When installing the proposed enclosure in a cabinet or container, it is possible to reliably connect the glasses 11 with similar glasses installed on the neighboring enclosures or on the inner surface of the walls (containers),

In this way, it is possible to dump heat from the most thermally}

0 blocks for less loaded ones or on the cabinet body (container). This makes it possible to expand the operational capabilities of the case and in some cases to avoid forced air cooling. The heat generated by the apparatus, which is installed inside the housing, is removed to the housing. From the surface of the housing, heat can be removed by an environment with natural or forced convection and thermal conductivity, for example, and a specially cooled plane (cold plate) to which the bottom 2 of the housing is attached. . When airflows around the body, heat exchange occurs on the outer surfaces of the body with the surrounding medium. A significant number of glasses b provides the transformation of the side walls 1 in

0 developed heat exchange surfaces and intensifies testocum, Tight fit of glasses b ensures alignment of the temperature floor of the side walls, which eliminates

5 the possibility of the occurrence of local overheating.

The invention provides improved heat transfer efficiency.

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Claims (5)

1. A SEALED HOUSING FOR electronic equipment, comprising a casing with flat ribs hermetically connected to the lid, a stiffener located on the side walls of the casing between its flat ribs with the possibility of providing thermal contact between them, characterized in that, in order to increase heat transfer efficiency, the grating stiffness is formed by thin-walled cups with hemispherical bottoms • and perforated cylindrical walls connected by their ¹ bottoms to the side walls of the casing. I 2. Case in accordance with π. 1, characterized in that the perforation of each thin-walled cup is made in the form of through longitudinal slots of variable width, decreasing towards its bottom, ' 3. The body of the pop, 1, is distinguished by the fact that the perforation of each thin-walled cup is made in the form of transverse slots. 4. Case in accordance with π. 1, characterized in that the perforation of each thin-walled machine is made in the form of round holes. 5. The housing according to paragraphs. 1-4, characterized in that at least one of the thin-walled glasses on each Juice wall is made of a higher height, than other thin-walled glasses.